| A | B |
|---|
| synarthrosis | immovable joint |
| amphiarthrosis | slightly moveable joint |
| diarthrosis | freely moveable joint |
| capsule | this fits over two bones in a joint like a sock and holds them together |
| connective tissue | this makes up the capsule, ligaments, and the periosteum |
| synovial fluid | this keeps the joint from having too much friction while it moves |
| ligament | connects bone to bone |
| ball and socket | type of joint that allows the most movement in most directions |
| gliding | type of joint where bones rock on each other |
| hinge | type of joint where bones swivel around each other |
| pivot | type of joint where bones axis and atlas vertebrae rotate on each other |
| saddle | this allows the thumb to move |
| flexion | decreases the angle of a joint |
| extension | this increases the angle of a joint |
| adduction | movement of a limb towards the center of the body |
| abduction | movement of a limb away from the center of the body |
| circumduction | moving the far end of a limb in a circle |
| rotation | spinning in place |
